I have tried to compile a code in Linux Ubuntu 12.04 (same as Linux Mint 13). When I try to compile this code, I get error message like this : /usr/lib64/liblapack.a(dgesvd.o): In function `dgesvd_': (.text+0x3b0): undefined reference to `_gfortran_concat_string' /usr/lib64/liblapack.a(dgesvd.o): In function `dgesvd_': (.text+0xe33): undefined reference to `_gfortran_concat_string' /usr/lib64/liblapack.a(dormbr.o): In function `dormbr_': This problem showed